Dell S4148U-ON OS10 Enterprise Edition User Guide Release 10.4.0E R2 - Page 626
Con ETS, values in a hyphenated range or
![]() |
View all Dell S4148U-ON manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 626 highlights
• Egress queuing policy - Configure ETS for egress traffic by assigning bandwidth to matching lossless queues in queuing class and policy maps. • Apply both PFC network-qos (input) and ETS queuing (output) policies on an interface to ensure lossless transmission. • An ETS-enabled interface operates with dynamic weighted round robin (DWRR) or strict priority scheduling. • OS10 control traffic is sent to control queues, which have a strict priority that is higher than data traffic queues. ETS-allocated bandwidth is not supported on a strict priority queue. A strict priority queue receives bandwidth only from DCBX TLVs. • The CEE/IEEE2.5 versions of ETS TLVs are supported. ETS configurations are received in a TLV from a peer. Configure ETS ETS provides traffic prioritization for lossless storage, latency-sensitive, and best-effort data traffic on the same link. • Configure classes of dot1p and DSCP traffic and assign them to lossless queues. Use the class-trust class map to honor ingress dot1p and DSCP traffic. • Allocate guaranteed bandwidth to each lossless queue. An ETS queue can exceed the amount of allocated bandwidth if another queue does not use its share. ETS is disabled by default on all interfaces. 1 Configure trust maps of dot1p and DSCP values in CONFIGURATION mode. A trust map does not modify ingress values in output flows. Assign a qos-group (traffic class 0-7) to trusted dot1p/DSCP values in TRUST mode. A qos-group number is used only internally to schedule classes of ingress traffic. Enter multiple dot1p and dscp values in a hyphenated range or separated by commas. trust dot1p-map dot1p-map-name qos-group {0-7} dot1p {0-7} exit trust dscp-map dscp-map-name qos-group {0-7} dscp {0-63} exit 2 Configure a QoS map with trusted traffic-class (qos-group) to lossless-queue mapping in CONFIGURATION mode. Assign one or more qos-groups (0-7) to a specified queue in QOS-MAP mode. Enter multiple qos-group values in a hyphenated range or separated by commas. Enter multiple queue qos-group entries, if necessary. qos-map traffic-class queue-map-name queue {0-7} qos-group {0-7} exit 3 Create a service policy for the class-trust class in CONFIGURATION mode. Enter POLICY-CLASS-MAP mode and specify that dot1p or DSCP values are trusted. policy-map trust-policy-map-name class class-trust trust {dot1p | dscp} exit 4 Create a queuing class map for each ETS queue in CONFIGURATION mode. Enter match queue criteria in CLASS-MAP mode. class-map type queuing class-map-name match queue {0-7} exit 5 Create a queuing policy map in CONFIGURATION mode. Enter POLICY-CLASS-MAP mode and configure the percentage of bandwidth allocated to each traffic class-queue mapping. The sum of all DWRR-allocated bandwidth across ETS queues must be 100% (not including the strict priority queue). Otherwise, QoS automatically adjusts bandwidth percentages so that ETS queues always receive 100% bandwidth. The remaining non-ETS queues receive 1% bandwidth each. policy-map type queuing policy-map-name class class-map-name bandwidth percent {1-100} 626 Converged data center services
![](/manual_guide/products/dell-s4148uon-os10-enterprise-edition-user-guide-release-1040e-r2-86f2ab4/626.png)